Assighobs to james h



messes ber X of the tower B, through the inlet 37.

The pump 38 is then set in operation to draw the liquor from thischamber and force it up- The valved connections 48 and-58 are adjustedso that liquor from the main-4O will flow therethrough and into thesprays 50 and nozzles 56, res actively, The nozzle 42 is connected at altimes with the main through a branch 1-1, thereby providing a spray ofraw or Weak liquor against the shield 35. The valve-51 in the main 4:?is normally closed and the main i0 is in open tanninunicetion with themain 47. Therefore the upper portion of main l? will convey a weakliquor to the manifold chamber and sprays 53.

The furnace A is fired when the pump 38 started, thereby producing aquantity of hot gases which will pass through into the tower B and riseto, meet the down coming liquor. Air is forced through the air duct it)and inlets 11 While the furnace is in oper ation, thereby creating adraft to force the products of combustion and hot gases up through thetower B.

The liquor being sprayed into the tower through the sprays and nozzles56, will bill onto the shield 36 and be directed into 2e chamber Whilethe liquor sprayed il'irough the sprays 53 will fall over the upper unitof battles and into the trough 32 Trom which it rill be conducted intothe settling hasin 23.

As the liquor is sprayed into the tower it oust fall against thecounter-current of hot which cause it to give up its Water and olubletar vapors, forming a concentrated solution and salt crystals. 1

As the chamber Y becomes sufiiciently pier, the pump it is started inmotion to the concentrated and salt ladened or'into the main 4?, and thevalved concs 56 "will receive their supply entirely in the main 4?, andthe sprays 50 will ree e mixed supply from both mains 40 4M. ..heapparatus will theii re-circulatethe quid from the chamber Y andsettling! tank a i rtil the desired degree of saturation is obtained,and at the same time continually draw raw or Weak liquor from thechamber weirdly through the main 40.

.viding a body led with concentrated and salt ladened' minus 48 and 58are adjusted so that the t 'ing X by means of the pump 38 which willforce it through the mains 4-0 and upper portion of main 4?, such liquorbeing; mixed with the saturated liquor from main li in the sprays 50,and being led exclusively thron sprays 53. The liquor from the spr Iconcentrated as it falls over the balilca in the upper unit, and also issaturated with salt crystals carried upwardly mechanically by the hotgases and is, therefore, conducted directly into the settling chamber23.

As the lit uors become saturated-the salts are remover in any desiredmanner from ti o settling basin 23. Preferably the ejector will beemoloyed to force the salts from the basin 23 into the salt box (55.

The above method requires less heat, causes a more eliicientpurification of the liquors by aeration, and concentrates the liquors tothe desired degree in less time than any method employed or knownheretofore.

We claim l. The method of treating crude ammonia liquor from by-productcolre plants to recover the salts of ammonium chloride and other saltsthereiin which consists in passing such liquor down through a tower overnoncorrodible bullies, and posing a counter flow of hot nus up throughsaid toner, spra ving a quantity of the liquor into the path of said hotgas and up against the lower butiies. collecting all of said liquor inthe lower portion of the tower. and passing said liquor in a continuouscircuit from the bottom of the tower upward through suitable conduitsand spraying it down over said bullies against said counter-flow of hotgas causing it to evaporate until the desired degree oi concentration isellectcd. v

2. The method f treating crude anunonla liquor from b -product cokeplants to recover the salts of ammonium chloride and other saltstherein, which consists in proof said liquor in a basin at the lower endof a tower continuously circulating said liquor uynvardl; through suitable conduits along; said tower and spraying it into the tower so as tocause it to pass down through said tower over a plurality ofnon-corrodible baffles, passing a counter flow of hot gases up throughsaid tower to concentrate said liquor to the desired degree, andspraying a quantity of the liquor into the path of said hot gases and upagainst the-lower baffles to protect them. from inqury by the hot gasesand to prevent suiting thereon.

3. The method oi treating crude ammonia liquor from by-product cokeplants to recover the salts of ammonium chloride other salts therein,which consists in providbody of said liquor in basin at the lower end ofa tower continuously circulating said liquor upwardly through suitableconduits along said tower and spin and Patented May l5, i923.

eaten stares I at sister,

TAT/[ES H. MATTHEWS, OF PITTSBURGH, AND V/ILLIAM E. ECKE, OF EMSWORTI-I,

:enNNsYtvANIa, AssIG oI-is 'IO JAMES H. MATTHEWS 8: COM?ANY, OF PITTS-BURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

Application filed March 29, 1920, Serial No. 369,667.

To all whom it mag concern Be it known that we, James H. hla'rrrinws,residing at Pittsburgh, in the county of Allegheny and State of Pennsyhvania, and WILLIAM R. Eons, residing at Einswortn, in the county ofAllegheny and State ofPennsylvania, both citizens of the United States,have invented or discovered certain new and useful improvements inMethods of and Machines for Swaging Blanks, of which improven'ients thefollowingis a specification. p

(.lur invention relates to improvements in methods of and machines forswaging blanks for dies and master dies. Fig. l is a view partly in sideelevation, partly in vertical section of a machine in which and in theoperation of which our invention resides; Fig. 11 is a view in endelevation and Fig. Illa view in side elevation, and to larger scale thanFig. I, of a die blank which'has undergone the swaging operation.

While not so narrowly limited inapplicability, we shall, by way ofexample, describe ourinvention applied to the manufacture of dies oftool steel, such as are now commonly used for stamping characters uponthe surfaces of metal articles.

Such a dieis illustratedin Figs. 11 and III. It is formed of tool steel.The surface configuration is in this case that of the letter A. This.character stands in re lief; its members rise to an edge like a coldchisel, and when the tool is applied like a cold chisel to a metalsurface and struck by a ha 'nmer upon its end, these edges cut into andimposed upon the metal surface the character which the die bears. v

The die is shaped. by swaging under another master die, while thesteel-of which it is composed is still unhardened. When shaped, it ishardened, and it then is serviceable. p

It is dificult, in'swaging these dies in the manner heretoforeprevalent, to cause the metalof'the blank to rise and fully fill all theconcavities of surface configuration of the master die; very greatswaging pressure is required, to reduce to a practicable minimum thepercentage of defectives in output. In the practice of our invention,'eziaction respecting pressure is not so great, ano the percentage ofdefective article in the output is din'iinished.

to face with a blank 64 set in anvil Renewed April 9, 1923.

In the machine of Fig. I of the drawings a suitable frame 1 carries ananvil block 2. This anvil block may be elevated in frame] by the actionof wedges 3 l. In the anvil block 2 is a seat for a blank (1. It is uponthe upper surface of this blank (6 that a configuration is to be imposedby swaging-such a configuration, for example, as that of the die ofFigs. 11 and III.

In the upper part of the frame 1, in axial alignment with the seatinanvil 2 for the blank is a rotatable shaft 5, and means are shown forpowerfully rotating it, from a shaft (5 through bevelled gears T and 8.The shaft 5 carries splined to it a disk 9 and on the face of disk 9 iscarried a member 10. To member 10 a member 11 is connected, bybalLand-socket joint, as the drawing shows. li fember ii is providedwith a seat for a master die 6, and member 11 becomes, as lated to auvil member 2, a hammer member. The member 1Q is secured to disk 9 bymeans, such as bolts 12 passing through slots, which admit ofadjustmentof the ball and socket joint to aposition of greater or lesseccen: tricity with respect to the axis of shaft A guide 13 holds member11 so positioned that a master die Z) secured in it stands face block 2.

It will be seen that member 10 being set as shown, eccentric'ally withrespect to shaft 5, rotation of the shaft will cause master die 7) toroll relatively to blank a in what may properly be termed an orbitalmotion. In this motion, there \villbe no advance of die b or of anyportion of it in circumferential direction respecting the axis ofturning of shaft 5, but there will be an orbital progress of the tippingposition of the die around that center of turning.

While rotation is maintained of shaft 5, with the consequent effect inthe movement of die 6 which has been described, blank (1 is by theturning of screw l raised and swaging pressure exerted between blank anddie.

The consequence is that, instead of having the swaging pressure spreadover all the area of the meeting faces of die and blank, that pressureis localized and confined to a smaller region, where being concentratedit becomes proportionately more effective; furthermore, as the orbitalmotion of the tipping of the die progresses, the region of driven by ascrew The back Wall 17 has a cutaway portion at its bottom forming anoutlet 22 opening into a settling chamber-or basin 23, which is providedwith a depression 24 in its bottom so as to allow for cbmplete drainageof all liquid.

Spaced at intervals along the length of the tower from a pointconsiderably above the top of the furnace, are a plurality of batiiesupports 25, which. are composed of wood or other non-corrosivematerial. The supports 25 are spaced so as to form upper and lower unitsor groups, and each support is mounted rigidly in tie side walls of thetower to support suitable battles C.

The bellies G are composed of bottom and top layers of sections 26, eachsection being composed of a lurality of slats 26 set edgewise and spaceby separators or spacers 25, and held together by suitable pins 27 whichpass through the slats and separators and have wedges 28 passing throughtheir ends to bind the parts together. The under sides of the slats 26are notched at 29 to fit over the supports 25', and further cut away toform a plurality of drip points 30.

The sections 26 forming the-lower layer are supported directly upon thesupports 25,

and the slats extend at right angles to said supports, while thesections 26 of the top layer are supported on the lower sections andextend the opposite direction or at right angles to the sections of thebottom layer, thereby forming a checker-like balile.

The battles C are composed completely of Wood or other non-corrosivematerial.

The liquor which is treated in the upper portion of the tower and whichwill fall or be sprayed over the upper unit or group of battles is ofdifferent quality than that to be treated in the lower portion, andtherefore,

is caught before it falls onto the lower unit or group of baflles in anannular trough A suitable coneshaped shield 33 is arranged centrallywithin the tower and spaced above the trough 32, and has its lower edgesoverlying the inner edge of the trough so as to direct the liquor intothe trough.

A deflecting shield or bafile plate 35 is secured to the front wall 16of the tower, slightly above the furnace A, and extends downwardly andinwardly on an angle, so as to deflect a spray of liquor in sheetformation past the mouth of the furnace A and into the chamber X of thetower, thereby J ceive and direct the liquor falling from the the tower.

The liquor to be treated, which is termed weak liquor, enters thechamber X of the tower A through a suitable inlet 37 and is drawn fromthe chamber X by a pump 38 having an inlet pipe 39 communicating withthe chamber. The pump 38 forces the weak liquor upwardly through a main40 running parallel with the rear wall of the tower. A suitable branchpipe 41 is connected with the pipe 40 and is provided with a nozzle 42to provide a spray of weak liquor against the shield 35.

A suitable pump -14 having inlet pipes 45 and 46 communicating with thechamber Y and settling basin 23 respectively, is pro vidcd to draw thesaturated or already treated liquor from the chamber Y and settlingbasin 23, and to force said liquor up wardly through a main 4? whichextends the entire height and parallel with the tower.

A suitable valved branch connection 48 leads from both of the mains 4dand $7 to a suitable manifold distributor 49, having a plurality ofsprays 50 adapted to spray liquor over the lower unit of baffles.

The main 40 is connected with the main a7 at a point above the branch48, and the main 47 is provided With a valve 51 below this cennection sothat the flow of liquor from pump 44; will normally be shut from thisportion of the main.

A second manifold distributor 52 having a plurality of sprays 53 isprovided to spray liquor from the top of the tower over the upper unitof battles. The manifold distributor is connected with the upper end of1,

I and 47 by suitable valved connections 58, and

are adapted to normally take their supply from the main 47, therebyspraying saturated liquor into the products of combustion and againstthe lower bai'iies, to protect said battles against disintegration dueto overheating, and such spray also serving to further condense theliquor.

T he spraying of weak liquor through the sprays 53 serves to condensethe liquor, and also to wash down any traces of ammonium chloride in theform of salt carried 11111116- chanically by outgoing vapors andtheproducts of combustion. The condensed liquor and salts from the upperunit of battles-falls into the trough 32 and is conveyed by a maindownward into the settling basin 23.

A suitable salt ejector and salt box 65 is arranged above the settlingchamber 23 to remove the salt therefrom. Any suitable ous swagingpressure between die and blank over a region of contact less than theWhole area of the faces of die and blank, and causing such contact,advancing into new regions, to traverse progressively the entire area.

4. The herein described method of making dies with cutting edges raisedin relief upon their faces, which consists in bringing anunhardenedblank and a forming member into face to face contact, then Whilemaintaining a continuous swaging pressure between them, rolling one ofsaid parts in orbital motion upon the other, and finally hardening thearticle.

5. In a machine for swaging blanks the combination with means forsustaining blank and die opposite one another and with axes angularlydisposed one to the other, blocks engaging the otherwise free ends ofsaid members, and means for imposing through said blocks both swagingpressure and orbital motion, substantially as described.

6. In a machine for swaging die blanks the combination of a master diehaving a surface of generally convex conformation and symmetrical withrespect to a point, means for sustaining such die and the blank to beswaged with the point of symmetry of the die lying in the axis of theblank and the axis of the die angular to the axis of the blank, followerblocks adapted to bear upon die and blank, and to exert thereon swagingpressure, one of said follower blocks having an orbital motion aroundthe prolonged axis of the opposite member, substantially as described.

7. In a machine for sWaging dies the combination of an anvil member anda hammer member, provided with seats for master die and blank, a rotaryshaft, a block borne by said shaft, ball-and-socket connection betweenblock and hammer member, said block being adjustable in its bearing uponsaid shaft, substantially as described.

In testimony whereof we have hereunto set our hands.

JAMES H. Iv ATTHEWS. WILLIAM R. ECKE. lVitnesses:

WM. M. JENKINS,

H. W. LAUDERMILCH.

